37
There is a dedicated AC distribution box in the lower section of ES4710BD
backplane, distributing power supply for the corresponding AC power module. A
grounding post is provided on the chassis on both sides of the distribution box for switch
grounding. There is also an extraction handle, which is intended for the installation and
removal of the distribution box only.
Never lift or move the switch with this handle!
1.4.4.2.1 AC Power Distribution Box
Enterprise network users usually require equipment to have 220 VAC input, the AC
power modules and AC distribution box can satisfy this application. Three 220V/110 VAC
power input sockets are provided on the panel of the ES4710BD AC distribution box. Input
AC power will first pass through protective circuits, such as the AC filter, lightning
protection tube, and then provide power for the three AC power modules. The other
modules and fan trays are powered only after the DC output from the power modules are
equalized and coupled. A wiring clip is provided above each 220V/110 VAC input socket
for the positioning of power cords and easier wiring. In addition, on the left side of the AC
distribution panel is a power supply switch used to control the modules’ power output .
Please turn this power supply switch on during normal operation of the ES4710BD.
The Front Panel view is shown below:
Fig 1-23
ES4710BD
AC
Power Distribution Box
1.4.5 System Backplane
The system board of ES4704BD series switch is located inside the switch, providing
interconnectivity in the high speed data links between management switching modules,
network interface modules and between all management and control signals of various
cards. A backplane has been installed in the unit chassis. The backplane provides the
following functions:
z
Provides communication channel for cards to achieve interconnectivity of
various signals
z
The backplane is powerless
z
Supports the hot-swapping of various cards
z
Supports Mainboard Master-Slave swap
z
Auto identification of all slots
z
Distributed power supplies
z
Introduction of monitoring signals for fans and power supplies
Содержание ES4704BD
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